Brazilian President Dilma Rousseff, shown at the presidential palace in Brasilia last year, was part of a leftist guerrilla group in the 1960s and '70s that opposed the military dictatorship.

Brazilian President Dilma Rousseff, shown at the presidential palace in Brasilia last year, was part of a leftist guerrilla group in the 1960s and '70s that opposed the military dictatorship. (Fernando Bizerra Jr. / European Pressphoto Agency)

Brazilian President Dilma Rousseff, shown at the presidential palace in Brasilia last year, was part of a leftist guerrilla group in the 1960s and '70s that opposed the military dictatorship.